diff --git a/rubycon.gemspec b/rubycon.gemspec
index 1cbd154..1a00216 100644
--- a/rubycon.gemspec
+++ b/rubycon.gemspec
@@ -21,7 +21,7 @@ spec = Gem::Specification.new do |s|
   s.add_dependency              'colored',          '~> 1.2'
   s.add_dependency              'gli',              '~> 2.5'
   s.add_dependency              'highline',         '~> 1.6'
-  s.add_dependency              'parallel',         '~> 0.7'
+  s.add_dependency              'parallel',         '~> 1.4'
   s.add_dependency              'steam-condenser',  '~> 1.3'
   s.add_development_dependency  'minitest'
   s.add_development_dependency  'coveralls'